If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Maha Sarakham: The hottest months are usually April and March, with an average temperature of 30°C, while the coldest months are January and December, with an average of 25°C. The rainiest months in Maha Sarakham are September, July, August and May, with each month seeing an average of 285 mm of rainfall.